Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Expression of (A) hypoxia inducible factor-1α, (B) VEGF and (C) VEGF receptor 2 was observed to be increased in the lung epithelium collected from smoking chronic obstructive pulmonary disease subjects, as detected by immunohistochemistry (magnification, ×200 and ×400 as indicated). VEGF, vascular endothelial growth factor.
